PROCEDIMIENTO DE REFORMA CATALITICA, EN LECHO FLUIDIFICADO CON VAPOR, DE LOS HIDROCARBUROS LIGEROS Y PESADOS, CON VIS- TAS A OBTENER MEZCLAS RICAS EN ETILENO Y PROPILENO.

摘要

1,266,586. Cracking hydrocarbons. SOC. CHIMIQUE DE LA GRANDE PAROISSE AZOTE ET PRODUITS CHIMIQUES. 24 June, 1969 [25 June, 1968], No. 31918/69. Heading C5E. A hydrocarbon feedstock is converted to a mixture of high ethylene and/or propylene content by passing the feed in the presence of steam through a fluidized bed of particles of a stable catalyst composition, which is resistant to temperatures of 650-900‹ C. and superatmospheric pressure, formed by sintering refractory oxides of which not more than a minor proportion by weight are readily reducible, where the particles are of restricted porosity and have a specific surface of 0À02-10 m.2/g. and where the catalysts are not regenerated. Preferred catalyst compositions comprise by wt. 30-70% MgO, 25-40% Zr 2 O and 1-4À5% rare earth oxide or 50-70% MgO, not more than 20% Al 2 O 3 and a minor proportion of ferric or ferrosoferric oxides. The feedstock may be introduced at 200-600‹ C. into the fluidized bed at 650-900‹ C. and up to 50 bars absolute. The weight ratio of steam to carbon in the feedstock may be 0À5-4 : 1.